/* vi: set expandtab sw=4 sts=4: */
/* release_parse.c - the opkg package management system

   Copyright (C) 2010,2011 Javier Palacios

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2, or (at
   your option) any later version.

   This program is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.
*/

#include "config.h"

#include <stdio.h>
#include <malloc.h>

#include "opkg_message.h"
#include "release.h"
#include "release_parse.h"
#include "xfuncs.h"
#include "parse_util.h"

static int release_parse_line(void *ptr, const char *line, uint mask)
{
    release_t *release = (release_t *) ptr;

    int ret = 0;
    unsigned int count = 0;
    char **list = 0;
    static int reading_md5sums = 0;
#ifdef HAVE_SHA256
    static int reading_sha256sums = 0;
#endif

    switch (*line) {
    case 'A':
        if (is_field("Architectures", line)) {
            release->architectures = parse_list(line, &release->architectures_count,
                    ' ', 0);
        }
        break;

    case 'C':
        if (is_field("Codename", line)) {
            release->name = parse_simple("Codename", line);
        } else if (is_field("Components", line)) {
            release->components = parse_list(line, &release->components_count,
                    ' ', 0);
        }
        break;

    case 'D':
        if (is_field("Date", line)) {
            release->datestring = parse_simple("Date", line);
        }
        break;

    case 'M':
        if (is_field("MD5sum", line)) {
            reading_md5sums = 1;
            if (release->md5sums == NULL) {
                release->md5sums = xcalloc(1, sizeof(cksum_list_t));
                cksum_list_init(release->md5sums);
            }
            goto dont_reset_flags;
        }
        break;

#ifdef HAVE_SHA256
    case 'S':
        if (is_field("SHA256", line)) {
            reading_sha256sums = 1;
            if (release->sha256sums == NULL) {
                release->sha256sums = xcalloc(1, sizeof(cksum_list_t));
                cksum_list_init(release->sha256sums);
            }
            goto dont_reset_flags;
        }
        break;
#endif

    case ' ':
        if (reading_md5sums) {
            list = parse_list(line, &count, ' ', 1);
            cksum_list_append(release->md5sums, list);
            goto dont_reset_flags;
        }
#ifdef HAVE_SHA256
        else if (reading_sha256sums) {
            list = parse_list(line, &count, ' ', 1);
            cksum_list_append(release->sha256sums, list);
            goto dont_reset_flags;
        }
#endif
        break;

    default:
        ret = 1;
    }

    reading_md5sums = 0;
#ifdef HAVE_SHA256
    reading_sha256sums = 0;
#endif

 dont_reset_flags:

    return ret;
}

int release_parse_from_stream(release_t * release, FILE * fp)
{
    int ret;
    char *buf;
    const size_t len = 4096;

    buf = xmalloc(len);
    ret = parse_from_stream_nomalloc(release_parse_line, release, fp, 0, &buf,
                                     len);
    free(buf);

    return ret;
}
